<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <link rel="stylesheet" href="./bootstrap/css/srk.css"/>

</head>
<body>

<div style="padding: 100px 100px 10px;">
    <form class="bs-example bs-example-form" role="form">
        <div class="input-group lg">
            <!--<span class="input-group-addon"></span>-->
            <input type="text" class="form-control lg" placeholder="输入">
        </div><br>

        <div class="input-group m">
            <span class="input-group">@</span>
            <input type="text" class="form-control m" placeholder="呵呵">
        </div><br>

        <div class="input-group  s">
            <span class="input-group-addon">@</span>
            <input type="text" class="form-control s" placeholder="哈哈">
        </div><br>

        <div class="input-group  mi">
            <span class="input-group-addon">@</span>
            <input type="text" class="form-control mi" placeholder="嘻嘻">
        </div>
    </form>
</div>


<div style="padding: 100px 100px 10px;">
    <form class="bs-example bs-example-form" role="form">
        <div class="input-group lg">
            <span class="input-group-addon">@</span>
            <input type="text" class="form lg" placeholder="输入">
        </div><br>

        <div class="input-group m">
            <span class="input-group">@</span>
            <input type="text" class="form m" placeholder="呵呵">
        </div><br>

        <div class="input-group  s">
            <span class="input-group-addon">@</span>
            <input type="text" class="form s" placeholder="哈哈">
        </div><br>

        <div class="input-group  mi">
            <span class="input-group-addon">@</span>
            <input type="text" class="form mi" placeholder="嘻嘻">
        </div>
    </form>
</div>


<div style="padding: 100px 100px 10px;">
    <form class="bs-example bs-example-form" role="form">
        <div class="input-group lg">
            <span class="input-group-addon">@</span>
            <input type="text" class="control lg" placeholder="输入">
        </div><br>

        <div class="input-group m">
            <span class="input-group">@</span>
            <input type="text" class="control m" placeholder="呵呵">
        </div><br>

        <div class="input-group  s">
            <span class="input-group-addon">@</span>
            <input type="text" class="control s" placeholder="哈哈">
        </div><br>

        <div class="input-group  mi">
            <span class="input-group-addon">@</span>
            <input type="text" class="control mi" placeholder="嘻嘻">
        </div>
    </form>
</div>

<div style="padding: 100px 100px 10px;">
    <form class="bs-example bs-example-form" role="form">
        <div class="input-group lg">
            <span class="input-group-addon">@</span>
            <input type="text" class="con lg" placeholder="输入">
        </div><br>

        <div class="input-group m">
            <span class="input-group">@</span>
            <input type="text" class="con m" placeholder="呵呵">
        </div><br>

        <div class="input-group  s">
            <span class="input-group-addon">@</span>
            <input type="text" class="con s" placeholder="哈哈">
        </div><br>

        <div class="input-group  mi">
            <span class="input-group-addon">@</span>
            <input type="text" class="con mi" placeholder="嘻嘻">
        </div>
    </form>
</div>

</body>
</html>